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Bare with me as I try to explain and get advise
My father in law recently purchased a 2005 C50 Boulevard from an older gentleman for $3,000. The bike has a little over 12,000 miles it and has a Cobra Exhaust. When we showed up to test ride the bike it was running a little rough and we were told it had been sitting for about a year in his garage. As the bike warmed up it ran better but still had some hesitation and felt like it was cutting out upon heavy throttle. We decided to pick it up thinking some fresh fuel and a quick service would fix it. We ended up changing the oil, air filter ,fuel and ran some injector cleaner through it and it didn't help much. After that wee decided to change the plugs (they looked good), and the bike still felt like it wanted to die upon snapping the throttle. If we slowly gave it throttle it was fine but heavy throttle she was choking out. I decided the next step was to pull the injectors and sure enough the injector closest to the battery was pretty dirty. After running them in my ultrasonic for about 10 cycles they are a lot cleaner. We installed them back on the bike but its still not running that great. Any suggestions? It runs a lot better but still feels like its a little rough.

Before cleaning
Hand Automotive tire Finger Thumb Nail
Hand Camera lens Finger Automotive lighting Gas


all the crap after 10 cycles of ultrasonic
Drinkware Fluid Gas Food storage containers Serveware

Gas Auto part Cylinder Circle Household hardware
after cleaning injectors
 

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The fuel pump is probably clogged. Some have a low pressure side filter that is easily replaced but then there is an internal one that is non repairable. Many have luck by reverse flushing the pump with raw fuel until it runs clear. The pump will probably be internal to the tank so that will have to removed to do this.

One thing if you do attempt to remove the pump....always fit a new seal to the pump housing. You could try some good cleaner through before any repairs are attempted...it may just clear whatever is causing the blockage. One other thing may be a pressure sensor...this cuts the fuel pump when the desired pressure is reached.

Good luck
 

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Bare with me as I try to explain and get advise
My father in law recently purchased a 2005 C50 Boulevard from an older gentleman for $3,000. The bike has a little over 12,000 miles it and has a Cobra Exhaust. When we showed up to test ride the bike it was running a little rough and we were told it had been sitting for about a year in his garage. As the bike warmed up it ran better but still had some hesitation and felt like it was cutting out upon heavy throttle. We decided to pick it up thinking some fresh fuel and a quick service would fix it. We ended up changing the oil, air filter ,fuel and ran some injector cleaner through it and it didn't help much. After that wee decided to change the plugs (they looked good), and the bike still felt like it wanted to die upon snapping the throttle. If we slowly gave it throttle it was fine but heavy throttle she was choking out. I decided the next step was to pull the injectors and sure enough the injector closest to the battery was pretty dirty. After running them in my ultrasonic for about 10 cycles they are a lot cleaner. We installed them back on the bike but its still not running that great. Any suggestions? It runs a lot better but still feels like its a little rough.

Before cleaning
View attachment 40211 View attachment 40213

all the crap after 10 cycles of ultrasonic
View attachment 40212
View attachment 40210 after cleaning injectors
we had a similar issue on a m 50 changed fuel pump no go changed sensor and fuel relay
had the wires at the coil really corroded on one side (different parts between L & R sides) 3 piece wire its a stupid setup but real easy to check at coil end for contamination changed coil and wires and all good
 
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